Hi, I have a Hisense 43A7NQ tv plus a Majority Snowdon soundbar and a pair pf Avantree Opers head phones. I have connected all three with optical leads. On my TV sound settings I chose SPDIF and all was excellent. That is until I switch back on my tv. The sound setting was on "TV speakers" and the soundbar was off. Dudio is coming from the tv speakers and I have to go back into settings and selkect SPDIF yet again and turn on the soundbar. I would very much appreciate opinions please. TIA jack